All of the following statements are true EXCEPT: isotopes of an element have the same atomic number. for any neutral element, the number of protons and electrons are equal. all atoms of a given element have the same mass number. the atomic number equals the number of protons. the mass number is the sum of the number of protons and neutrons.

Q: Describe the ideas of the Ancient Greeks on the atom and elements;

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Q: Is the statement inconsistent with Rutherford’s nuclear theory as it was originally stated? Why? The…

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Q: How many protons, neutrons, and electrons are contained in each atom with the given atomic number…

A: Given data part(a) Atomic number Z=17 Atomic mass A = 35 -----------------------------------------…

Q: There are three naturally occurring stable isotopes of magnesium: 24Mg, 25M., and 2°Mg, which have…

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Q: A specific isotope of an element is known to have 15 protons and 16 neutrons. Which symbol would…

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Q: Must the numbers of protons, electrons and neutrons be the same or different in each of the…

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Q: What is the atomic mass of an element? The atomic mass of an element is really the average mass of…

A: The mass of an atom is known as its atomic mass. It is usually expressed in g/mol or u where u is…

Q: which of the following statements concerning elements of the same period is correct? They have…

A: Here we have to choose correct option about  elements of the same period-

Q: 60% of the isotopes of bromine have an atomic mass of 79 amu while 40% of the isotopes of bromine…

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Q: 9. What is the atomic number of the atom in the diagram above? 10. What is the atomic mass/mass…

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Q: Rubidium has an atomic number of 37 and a mass number of 85. How many protons, neutrons, and…

A: Given  Rubidium  has an atomic number of 37and mass number of 85  and  carry  1+ charge.we need to…

Q: Read each description in the first column of the table below. If any chemical element with atomic…

A: Modern Periodic Table :-  The framework of the modern periodic table was given by Dmitri Mendeleev.

Q: 5. What are (i) mass, (ii) charge and (iii) location in the atom of each of the following sub-atomic…

A: Given sub-atomic particles, (a) Electron (b) Neutron (c) Proton

Q: The atomic mass of an element is equal to one-twelfth of the mass of a carbon-12 atom. a weighted…

A: ◆ One-twelfth the mass of C-12 atom is Atomic mass unit.

Q: The element lithium has two naturally occurring isotopes.One of these has a mass of 6.0151 amu and a…

A: Given that: mass of first isotope = 6.0151 amu abundance = 7.49 % mass of second isotope = 7.0160…

Q: 18. Complete the following table: Isotope Name Atomic Number of Number of Total Number of Number…

A: Isotopes are members of a family of an element that have the same number of protons but different…

Q: 20. The atoms of the elements in Group 2 have the same (1) mass number (2) atomic number (3) number…

A: Both answer is given below

Q: Which of the following statements is/are true? For the false statements, correct them. a. All…

A: In a nucleus, neutrons are neutrally charged whereas protons are positively charged

Q: Question attached

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Q: Write the symbolic notation of an isotope of an element having 8 protons, 8 electrons, and 11…

A: The symbolic notation of an isotope of an element having 8 protons, 8 electrons, and 11 neutrons

Q: Two different atoms have nine protons each and the same mass. However, one is neutral while the…

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Q: positively . negatively . neutral. electrons . neutrons. central . protons   fill in the blank…

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Q: Which of the following charges is not possible for a carbon atom or ion, which has 6 protons, a…

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Q: Atomic Mass VS Mass Number Atomic Mass: the welghted average of the mass of all the isotopes of an…

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Q: What are the two different notations for an element with 6 protons, 6 electrons, and 8 neutrons?

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Q: How many electrons, protons, and neutrons does an element given as 2450X have?

A: The atom is represented by a general formula i.e. ZXA here,        Z = Atomic no. Which is equal to…

Q: Read each description in the first column of the table below. If any chemical element with atomic…

A: There are chemical element with atomic number of 92 or  less than and that matches with a…

Q: Write the element symbol that fi ts each description. Use a superscript for the mass number and a…

A: a) an element that contains 10 protons and 12 neutrons Ne1022 b) an element with atomic number 24…

Q: If an extra neutron is added to the nucleus of an atom, which of the following is true?     A.…

A:

Q: Read each description in the first column of the table below. If any chemical element with atomic…

A: Atom Number (Z) should be equal or less than 92, which is of Uranium (U).  (1) An element in period…

Q: The mass number and atomic number of a nitrogen isotope are 15 and 7 respectively. Calculate the…

A: Atomic number is equal to the number of protons present in the atom.Mass Number = Number of protons…

Q: The isotope of an unknown element, X , has a mass number of 77. The most stable ion of this isotope…

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Q: cation of lithium a neutral atom of lithium  fill in the blank An element 'A' contains 3 protons,…

A: We have to identify atom ion having 3 protons, 3 electrons and 4 neutrons

Q: Read each description in the first column of the table below. If any chemical element with atomic…

A: 1) Given : An element in period 6 and group 1A.

Q: The most common isotope of oxygen has a mass number of 16, but two other isotopes having mass…

A: Isotopes are the compounds having same atomic number but different mass number.  They have same…

Q: Which of the following statements is/are incorrect? Select all that apply. You may choose more than…

A: Answer: Here, only the last option is incorrect, other than that the rest of the options given about…

Q: Beryllium has an atomic number of 4. How many neutrons does the isotope beryllium-9 have? O 4 O 13 9…

A: * Atomic number = Number of protons  For the neutral atom , Number of electrons = number of protons…

Q: 1. LIST THE THREE PRIMARY PARTICLES IN AN ATOM. DOK 1 The three main subatomic particles that form…

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Q: What does the following element description actually mean? N+1 1. a sodium atom with 11 protons,…

A: The symbol "N" represent the nitrogen atom. The atomic number of nitrogen is 7. The mass number of…

Q: a. Atoms of the same element that have different masses are called isotopes b. The masses of…

A: Answer:- We have to choose the following statements is false

Q: Which statement is true? O a. Protons and neutrons have the same mass, but electrons are much…

A: An atom contains subatomic particles like: 1. Protons (p) having a positive charge.  2. Electrons…

Q: An element has 2 isotopes : The 1st isotope has the atomic mass of 154.2 amu and abundancy% of…

A: Recall the data, 1st isotope => 154.2 amu, %abundance=81.20% 2nd isotope=> 155.7 amu,…

Q: Which of the following statements is TRUE, and why? A. Anions are usually larger than their…

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Q: Read each description in the first column of the table below. If any chemical element with atomic…

A: Note: Group 1A to 8A all have atomic number ⩽92.  Group 1 and 2 constitute the metals: a). Group 1…

Q: and not the identity of the element) 17 X 2+ Protons 7 Neutrons 10 electrons name (identity) of…

A: In atoms, electrons are revolving around the nucleus. Nucleus is made up of protons and neutrons.

Q: Which of the following statements are true concerning the core charge of carbon-12, carbon-13, and…

A: The objective of the question is to pick the best suitable option among the given options which best…